Reactive / Moisture Cured Silicone Adhesives and Sealants
Description
Reactive moisture-cured silicone adhesives and sealants are single-component materials that are designed to bond and seal surfaces. They are applied similarly to hot melt adhesives and undergo a curing process when exposed to moisture, resulting in a durable and resilient material. These adhesives are known for their ability to bond dissimilar materials and provide excellent chemical and abrasion resistance.
Working Principle
The working principle of reactive moisture-cured silicone adhesives and sealants involves a chemical reaction with moisture present in the environment. When the adhesive is applied, it begins to react with the moisture, leading to crosslinking and polymerization. This process transforms the adhesive into a solid, cured material that is elastomeric and temperature resistant. The moisture-curing mechanism allows these adhesives to be used in a variety of conditions without the need for additional curing agents or heat, making them highly versatile and useful in many engineering applications.
Applications
Reactive moisture-cured silicone adhesives and sealants are used in a wide range of applications due to their unique properties. They are commonly employed in automotive applications for gasketing, sealing, and bonding engine components. These adhesives are also used in the electronics industry for sealing and protecting electronic components from moisture and environmental damage. Additionally, they are suitable for use in construction for sealing joints and gaps in buildings, providing a weather-resistant barrier.
Advantages over other Silicone Adhesives and Sealants
One of the primary advantages of reactive moisture-cured silicone adhesives over other types is their ease of use as a single-component system, eliminating the need for mixing. They also offer excellent resistance to high temperatures, chemicals, and moisture, making them suitable for demanding environments. Their ability to bond dissimilar materials and maintain flexibility after curing further distinguishes them from other adhesive types.
Limitations
Despite their advantages, reactive moisture-cured silicone adhesives have some limitations. They may have longer curing times compared to other adhesive types, as they rely on atmospheric moisture to cure. This can be a drawback in environments with low humidity. Additionally, while they provide excellent resistance to liquid water, they may allow water vapor to pass through, which could be a concern in certain applications.
Considerations
When considering the use of reactive moisture-cured silicone adhesives, it is important to evaluate the initial costs and operating expenses. These adhesives are generally cost-effective due to their single-component nature, reducing the need for additional materials or equipment. However, the curing time should be factored into project timelines. In terms of durability, these adhesives offer long-lasting performance, but regular maintenance checks are recommended to ensure continued effectiveness. Replacement and maintenance costs are typically low, given their resistance to environmental factors and chemical degradation.
from Master Bond, Inc.
Master Bond MasterSil 705TC is a one component, thermally conductive, electrically isolating silicone for bonding, sealing and coating applications. It features outstanding thermal conductivity and is well suited for applications that require flexibility and high temperature resistance. It cures... [See More]
- Cure / Technology: Thermoset; Single Component; Reactive or Moisture Cured; Room Temperature Vulcanizing or Curing
- Substrate Compatibility: Ceramic, Glass; Composites; Metal; Plastic; Porous Surfaces; Dissimilar Substrates
- Compound Type: Sealant; Thermally Conductive; Adhesive
- Composition: Unfilled
from Master Bond, Inc.
Low viscosity MasterSil 152 is a two component, optically clear silicone system that cures when exposed to air at room temperature. It has outstanding electrical insulation properties, making it ideal for potting and encapsulation applications. Additionally it features a long working life and has a... [See More]
- Cure / Technology: Thermoset; Two Component ; Reactive or Moisture Cured; Room Temperature Vulcanizing or Curing
- Type / Form: Liquid
- Compound Type: Encapsulant, Potting Compound; Leveling Filling; Sealant; Adhesive
- Substrate Compatibility: Ceramic, Glass; Composites; Metal; Plastic; Porous Surfaces; Dissimilar Substrates
from Shenzhen DeepMaterial Technologies Co., Ltd
Used to protect printed circuit boards and other sensitive electronic components. It is designed to provide environmental protection. This product is usually used from -53°C to 204°C. [See More]
- Cure / Technology: UV or Radiation Cured; Reactive or Moisture Cured
- Industry: Electronics
from ThreeBond International, Inc.
Room-Temperature-Vulcanizing Silicone, or Silicone RTV's are used for sealing inner fluids via application to the joint surfaces of various flanges, screws, etc. ThreeBond silicones form a rubber elastic bond that have excellent vibration absorption, as well as chemical, shock and heat resistance. [See More]
- Cure / Technology: Single Component; Reactive or Moisture Cured; Room Temperature Vulcanizing or Curing
- Substrate Compatibility: Rubber or Elastomer
- Compound Type: Sealant
- Industry: Automotive
from Novagard Solutions
Non-corrosive, single component silicone sealant, self-leveling liquid [See More]
- Cure / Technology: Thermoset; Single Component; Reactive or Moisture Cured; Room Temperature Vulcanizing or Curing
- Type / Form: Liquid
- Compound Type: Encapsulant, Potting Compound; Sealant
- Substrate Compatibility: Ceramic, Glass; Composites; Metal
from Wacker Chemical Corp.
GENIOSIL® XT 50 is a silicone-modified polyetherbasedsilane-terminated polymer suitable as a binderin moisture curing formulations. It is a clear liquid witha slight but characteristic odor and differs toconventional silylated polymers due to its highreactivity. This is a direct consequence of the... [See More]
- Cure / Technology: Two Component (optional feature); Single Component; Reactive or Moisture Cured
- Type / Form: Liquid
- Compound Type: Encapsulant, Potting Compound
- Substrate Compatibility: Concrete, Masonry
from Bluestar Silicones USA Corp.
Clear, Two-Component, Addition Cure, Heat Curing Electronic coating Silicone Compound. Properties. Viscosity 6000. Hardness Sha 30. Description. BLUESIL V-207 is a clear, two component, addition cure, heat curing silicone rubber compound. It is designed as a primerless coating and encapsulating... [See More]
- Cure / Technology: Thermoset; Two Component ; Reactive or Moisture Cured
- Type / Form: Liquid
- Compound Type: Encapsulant, Potting Compound
- Industry: Electronics
from ThreeBond International, Inc.
Our UV curable resins are materials that are polymerized and cured in a short time by the energy radiated from ultraviolet irradiation devices. We offer our UV curing adhesives in many variations to meet almost any industrial need. Curing is completed in several seconds through UV light irradiation. [See More]
- Cure / Technology: UV or Radiation Cured; Reactive or Moisture Cured
- Substrate Compatibility: Plastic; Rubber or Elastomer
- Compound Type: Adhesive
- Viscosity: 10000
from Wacker Chemical Corp.
ELASTOSIL ® N199 is a non-slump RTV-1 silicone sealant that cures at room temperature on contact with moisture in the air. Special features. ready-to-use, one-part system. non-slump. translucent. medium hardness. high flexibility. Excellent adhesion. Application. general-purpose adhesive for the... [See More]
- Cure / Technology: Thermoset; Single Component; Reactive or Moisture Cured; Room Temperature Vulcanizing or Curing
- Features: Flexible
- Compound Type: Sealant; Adhesive
- Industry: Electronics